<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .cc1{

        }

    </style>
</head>
<body>

<div class="cc1">

</div>

<div class="c1" id="d1">
    are you ok?

    <span id="s1">span1</span>
    <span id="s2">span2</span>
    <span id="s3">span3</span>
</div>

<div class="c1 c2" id="d2">
    div2
</div>

<a href="http://www.baidu.com">百度</a>


<div id="d3">
    用户名: <input type="text" id="username" name="username">
</div>


<div id="d4">

    <select name="city" id="select1">
        <option value="1">广东</option>
        <option value="2">惠州</option>
        <option value="3">东莞</option>

    </select>

</div>


</body>
</html>